9
Right tailed, mu.
10
left-tailed, proportion.
11
two-tailed, sigma.
12
right-tailed, proportion.
13
left-tailed, mu.
14
two-tailed, sigma.
15
Ho: p = .105
H1: p > .105
Type 1 error: Determining the true proportion p is greater than .105 when it is not.
Type 2 error: Determining the true proportion p is not greater than .105 when it is.
17
Ho: m = $218,600
H1: m < $218,600
Type 1 error: Determining the true mean mu is less than $218,600 when it is not.
Type 2 error: Determining the true mean mu is greater than $218,600 when it is not.
19
Ho: std. dev. = .7 psi
H1: std. dev. < .7 psi
Type 1 error: Determining that the true standard deviation sigma is less than 0.7 psi when it is not.
Type 2 error: Determining that the true standard deviation sigma is greater than 0.7 psi when it is not.
21
Ho: m = $47.47 psi
H1: m (not equal) $47.47 psi
Type 1 error: Determining that the true mean mu is not equal to $47.47 when it is.
Type 2 error: Determining that the true mean mu is equal to $47.47 when it is not.
7
np(1-9) is greater then or equal to 10. 200(.3)(1-.3) = 42 42 > 10
The Pvalue = .0104
Reject the Null Hypothesis.
9
150(.55)(1-.55) is greater than or equal to 10 37.125 > 10
The Pvalue = .2296
We do not reject the Null Hypothesis.
11
500(.9)(1-.9) is greater than or equal to 10 45 > 10
The Pvalue = .1362
We do not reject the Null Hypothesis.
13
The Pvalue represents the sample proportion (.2743) if the population proportion is 0.5, that the majority of winners who outpreformed other companies in the same investment classes. We do not reject the null hypothesis, because there is not sufficient enough evidence.
15
The Pvalue = .2578
The Pvalue represents the probability that 1.9% of patients taking competing drugs complain of flulike symptoms. We accept the alternative hypothesis
17
The Pvalue = .1379
Do not reject the Null hypothesis, because there is not enough evidence to show that a majority of adults in the United States believe they will not have enough money to live comfortably in retirement.
19
The Pvalue = .0047
Yes there is significant evidence that basic mathematics skills are critical to employed adults in the United States. We reject the null hypothesis at the 0.05 level.